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Malgorzata Kloc, PhD

Research Professor of Surgery, Institute for Academic Medicine
Associate Research Member, Research Institute
Houston Methodist
Weill Cornell Medical College


Prior to completing her postdoctoral training in Canada, Dr. Kloc-Stepkowska was a tenured Associate Professor in the Department of Zoology at the University of Warsaw, Poland. She also served as a Research Associate in the Department of Biology at Carleton University in Ottawa, Canada. While completing her postdoctoral training, Dr. Kloc-Stepkowska earned the AHFMR Research Award from the University of Calgary and the MRC Biotechnology Training Award from Dalhousie University. She joined the University of Texas M.D. Anderson Cancer Center as a Research Scientist in the Department of Molecular Genetics in 1987, and became an Associate Professor in the Department of Biochemistry and Molecular Biology there in 2006. Dr. Kloc-Stepkowska joined the Houston Methodist Research Institute in 2008.

Description of Research

Dr. Kloc-Stepkowska’s research focuses on investigations into the role of structural RNA in the organization of cellular cytoskeleton. She has numerous publications in the medical literature and her current studies are funded by the National Science Foundation. Dr. Kloc-Stepkowska also works closely with Dr. R. Mark Ghobrial on transplant immunomodulation studies using allochimeric molecules to improve transplant acceptance.

Areas Of Expertise

Immunology Transplant biology Structural RNA Cytoskeleton
Education & Training

Postdoctoral Fellowship, Department of Biochemistry, Dalhousie University, Halifax, Nova Scotia
Postdoctoral Fellowship, Department of Biology, University of Calgary, Calgary, Alberta
PhD, University of Warsaw
MS, University of Warsaw
Postdoctoral Fellowship, Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia

Effects of genistein on insulin pathway related genes in mouse differentiated myoblast C2C12 cell line: evidences for two independent modes of action
Lewicki, S, Lewicka, A, Kalicki, B, Sobolewska-Ruta, A, Debski, B, Zdanowski, R, Syrylo, T, Kloc, M & Kubiak, JZ 2018, Folia Histochemica et Cytobiologica. DOI: 10.5603/FHC.a2018.0014

Magnetic Field Changes Macrophage Phenotype
Wosik, J, Chen, W, Qin, K, Ghobrial, RM, Kubiak, JZ & Kloc, M 2018, Biophysical Journal, vol 114, no. 8, pp. 2001-2013. DOI: 10.1016/j.bpj.2018.03.002

Effects of Hexachlorophene, a Chemical Accumulating in Adipose Tissue, on Mouse and Human Mesenchymal Stem Cells
Lesniak, M, Zdanowski, R, Suska, M, Brewczynska, A, Stankiewicz, W, Kloc, M, Kubiak, JZ & Lewicki, S 2018, Tissue Engineering and Regenerative Medicine, vol 15, no. 2, pp. 211-222. DOI: 10.1007/s13770-017-0103-9

Transcriptome analysis identifies genes involved in sex determination and development of Xenopus laevis gonads
Piprek, RP, Damulewicz, M, Kloc, M & Kubiak, JZ 2018, Differentiation, vol 100, pp. 46-56. DOI: 10.1016/j.diff.2018.02.004

Transcriptional profiling validates involvement of extracellular matrix and proteinases genes in mouse gonad development
Piprek, RP, Kolasa, M, Podkowa, D, Kloc, M & Kubiak, JZ 2018, Mechanisms of Development, vol 149, pp. 9-19. DOI: 10.1016/j.mod.2017.11.001

Screening RhoA/ROCK inhibitors for the ability to prevent chronic rejection of mouse cardiac allografts
Chen, W, Chen, S, Chen, W, Li, XC, Ghobrial, RM & Kloc, M 2018, Transplant Immunology. DOI: 10.1016/j.trim.2018.06.002

Inhibition of RhoA and mTORC2/Rictor by Fingolimod (FTY720) induces p21-activated kinase 1, PAK-1 and amplifies podosomes in mouse peritoneal macrophages
Chen, W, Ghobrial, RM, Li, XC & Kloc, M 2018, Immunobiology. DOI: 10.1016/j.imbio.2018.07.009

Development of Xenopus laevis bipotential gonads into testis or ovary is driven by sex-specific cell-cell interactions, proliferation rate, cell migration and deposition of extracellular matrix
Piprek, RP, Kloc, M, Tassan, JP & Kubiak, JZ 2017, Developmental Biology, vol 432, no. 2, pp. 298-310. DOI: 10.1016/j.ydbio.2017.10.020

Rho-specific Guanine nucleotide exchange factors (Rho-GEFs) inhibition affects macrophage phenotype and disrupts Golgi complex
Chen, W, Zhao, Y, Li, XC, Kubiak, JZ, Ghobrial, RM & Kloc, M 2017, International Journal of Biochemistry and Cell Biology, vol. 93, pp. 12-24. DOI: 10.1016/j.biocel.2017.10.009

Selection of mitochondria in female germline cells: is Balbiani body implicated in this process?
Bilinski, SM, Kloc, M & Tworzydlo, W 2017, Journal of Assisted Reproduction and Genetics, vol 34, no. 11, pp. 1405-1412. DOI: 10.1007/s10815-017-1006-3

Cell adhesion molecules expression pattern indicates that somatic cells arbitrate gonadal sex of differentiating bipotential fetal mouse gonad
Piprek, RP, Kolasa, M, Podkowa, D, Kloc, M & Kubiak, JZ 2017, Mechanisms of Development, vol 147, pp. 17-27. DOI: 10.1016/j.mod.2017.07.001

The phenotype of peritoneal mouse macrophages depends on the mitochondria and ATP/ADP homeostasis
Chen, W, Sandoval, H, Kubiak, JZ, Li, XC, Ghobrial, RM & Kloc, M 2017, Cellular Immunology. DOI: 10.1016/j.cellimm.2017.11.003

Macrophages and RhoA Pathway in Transplanted Organs
Liu, Y, Kubiak, JZ, Li, XC, Ghobrial, RM & Kloc, M 2017, . in Results and Problems in Cell Differentiation. vol. 62, Results and Problems in Cell Differentiation, vol. 62, Springer-Verlag, pp. 365-376. DOI: 10.1007/978-3-319-54090-0_15

Asymmetric divisions in oogenesis
Bilinski, SM, Kubiak, JZ & Kloc, M 2017, . in Results and Problems in Cell Differentiation. vol. 61, Results and Problems in Cell Differentiation, vol. 61, Springer-Verlag, pp. 211-228. DOI: 10.1007/978-3-319-53150-2_9

Role of Cdc6 During Oogenesis and Early Embryo Development in Mouse and Xenopus laevis
Borsuk, E, Jachowicz, J, Kloc, M, Tassan, JP & Kubiak, JZ 2017, . in Results and Problems in Cell Differentiation. vol. 59, Results and Problems in Cell Differentiation, vol. 59, Springer-Verlag, pp. 201-211. DOI: 10.1007/978-3-319-44820-6_7

Results and Problems in Cell Differentiation: Macrophages- Origin, Functions and Biointervention
Kloc, M (ed.) 2017, . vol. 62, 1st edn, Springer International Publishing. DOI:

Exogenous Molecule and Organelle Delivery in Oogenesis
Kloc, M & Kubiak, JZ 2017, . in Oocytes: Maternal Information and Functions. vol. 63, Switzerland. DOI: 10.1007/978-3-319-60855-6_1

Elusive role of TCTP protein and mRNA in cell cycle and cytoskeleton regulation
Kubiak, JZ & Kloc, M 2017, . in Results and Problems in Cell Differentiation. vol. 64, Results and Problems in Cell Differentiation, vol. 64, Springer Verlag, pp. 217-225. DOI: 10.1007/978-3-319-67591-6_11

Macrophages as effector cells in acute and chronic rejection.
Liu, Y, Kloc, M & Li, XC 2016, Topical Collection on Immunology, no. 4, vol. 3, vol. 3, Springer International Publishing. DOI: 10.1007/s40472-016-0130-9

Dissonant response of M0/M2 and M1 bone-marrow-derived macrophages to RhoA pathway interference
Liu, Y, Chen, W, Minze, LJ, Kubiak, JZ, Li, XC, Ghobrial, RM & Kloc, M 2016, Cell and Tissue Research, pp. 1-14. DOI: 10.1007/s00441-016-2491-x